/Engine/Source/Developer/MeshUtilities/Public/MeshUtilities.h
Calculates (new) non-overlapping UV coordinates for the given Skeletal Mesh
bool - whether or not generating the UVs succeeded
bool GenerateUniqueUVsForSkeletalMesh ( const [FSkeletalMeshLODModel](API\Runtime\Engine\Rendering\FSkeletalMeshLODModel) & LODModel, int32 TextureResolution, [TArray](API\Runtime\Core\Containers\TArray)< FVector2f > & OutTexCoords ) const